Question

the position time graph of an object in uniform motion is given below calculate the velocity with which the object is moving

Answer 1

please tell me whether correct

Answer 2

Answer:

The velocity of an object is 15 m/s.

Explanation:

Velocity is defined as,

The velocity is the first derivative of the position of the object.

$v = \dfrac{ds}{dt}$

According to graph,

The slope shows the velocity of the particle.

The slope is the ratio of change in displacement to the change in time.

The slope is defined as,

$m =\dfrac{\Delta s}{\Delta t}$

$\Delta s$ = change in displacement

$\Delta t$ = change in time

Put the value into the formula

$m=\dfrac{20-80}{4-0}$

$m=\dfrac{-60}{4}$

$m=-15\ m/s$

Negative sign shows only direction.

Hence, The velocity of an object is 15 m/s.